Remote controlled electrical reversing switch



Aug. 16,1938. w. LOHSSE 2,127,414

. REMOTE CONTROLLED ELECTRICAL REV-ERSING SWITCH Filed July 9, 1935 2Sheets-Sheet 1 e /?9' 123 i} {R I -0 2 77231)] V lnvemo/a- W- 9645K Aug.16, 1938. w. LOHSS-E 2,127,414

- REMOTE CONTROLLED ELECTRICAL REVERSING VSWITCH Filed July 9, 1935 2Sheets-Sheet 2 /n ventop:

Patented Aug-16,1938 I 2,127,414

unit's STATES Mentor-rice REMOTE CONTROLLED ELECTRICAL RE- VERSINGSWITCH Wilhelm Lohsse, (iladbach hheydt, Germany Application July 9,1935, Serial No. 30,550 in (Germany July 12, 1934 @laims. (G1. 125-375)The invention solves the problem of controlling the coil at even whenthe armature b is attracted. from afar an electrical reversing switchhaving The armature b has its lower end bearing against a multiplicityof switching positions and to move the switch lever g and is yieldablypressed against compulsorily the switch from any one position the latterby a spring 11. Since the armature b into another, as may be desired.This problem is in consequence of the stop it can onlydrop to thesolvedby means of a number of impulse givers position indicated, whichcorresponds to the neuindependent from one another, which is at leasttral position of the switch lever g, the spring n as great as the numberof switching positions. is tensioned when the armature e is attracted. Adetermined position of the switch is related to The switch-closingpressure buttons r and q and each impulse giver and the switch isnecessarily the switch-breaking pressure button s serve for m moved intothis position by the selection of the the remote control of the switch.correct impulse giver. The supply conductors 20 and 2| are connected Asan example of application of the invention with the opposite ends of thecoil d and constitute for the sake of simplicity an electrical reversingthe control circuit for said coil, the circuit clos- I .5 switch havingonly three switching positions is ing button 1' being interposed in theconductor 2|.

chosen. Any desired increase in the number of A branch conductor 22, inwhich the circuit closswitching positions is, however, possible. ingbutton q is interposed, connects the supply In the accompanying drawingswherein several conductor 21 with one terminal of the coil 0. andapproved embodiments of the invention are illusthe opposite terminal ofthe latter is connected trated: by a conductor 23 with the supplyconductor 20, 20

Fig. 1 is a diagrammatic view of an embodiment the auxiliary contact 1being interposed in the of the invention. conductor 23-. The, holdingcontact c closes a Figs. 2, 3 and 4 are similar views of threeconnection 24 leading from the conductor 22 to further embodiments ofthe invention. the terminal of the coil a following the energize.-

In Fig. 1, a represents the coil of a switch tion of said coil by manualoperation of the button magnet, b the armature of this magnet, c aholda. The circuit opening button a is connected in ing contact for theexciting current circuit of coil the conductor 22 between the conductors2 l and a, d the coil of a second switching magnet, c its 24, and, whenoperated, interrupts the iiow of armature, and I an auxiliary contactsecured on holding current to the coil a.

the armature e through which the exciting our- The arrangementoperatesasfollows. By press- 30 rent circuit of coil a is passed. mg onthe button q the circuits 2|, 22, 23 and 20 A common contact lever g isrotatably mounted of the coil a close and the armature b is attracted ath and carries the contact groups V and R, and closes the holding contact0 and conductor which in the corresponding switching positions 24. Nowthe tensioned spring at brings the lever g of the l v i? come into t t wt the into the position V. If the button s is pressed, plemental'yContacts In -1 9 the exciting current circuit of the coil or is broken,

dlcated the Contact groups V aim R are out of the armature b drops andthe lever g returns into contact with the complementary contacts i; them positmn O Switch is here in the position of Test F the If the button1' is pressed the coil d is energized 40 position of the Switching leverm Whlch the by the current flowing over the conductors 22 and 0 contactsv and i come Contact with each 2i and attracts its armature 0. By reasonof the other, a motor connected to the contacts V can be switched intomrward running. it the cum lost motion in the longitudinal aperture 1the at ,mcts R are in Contact with the contaets R can traction of thearmature e is unobstructed, even if a the armature b was previouslyattracted. By

22 figfig gg ggm fi f figffifgfg i reason of the lost motion from c theauxiliary 45 able in this way to switch an electric motor into fif isfirst opened and in this f' iorward or reverse running and to disconnectthe cmng vcurrent circuit f the coil o 15 broken. same motor completelyfrom the network in the 110274011 the armature e pulls m u positionO,which is in practice frequently desired. it y ea s of the Conta t ev mfor as v The armatures e and b have stops it against stop it out of thedie-energized coil a; whereupon which they abut in the neutral positionoi the simul neously the Switch 9 is moved into the switch lever o. Thearmature e hasa longitudinal position R and the spring 11. is tensioned.aperture lin which a bolt m secured on the lever "If the button 1' isopened the armature 6 drops g is movable; this permits e to be attractedby under the influence of the spring 11 to its stop It a and the contactlever 91 returns into the position of rest illustrated.

In Fig. 2 the individual parts are provided with the same referenceletters as in Fig. l. in so far as they are similar with thecorresponding parts of Fig. l. lileviating from Fig. 1 the armatures eand are similar to one another and each has a longi inal aperture E,which bears in the neutral pos :1 oi" the lever 57 against the bolts m.which are secur d to the lover a. Further, each armature ha. 1 a.stationary contact 1 and a holding cont t c.

Whilst in t arrangement of Fig. 1 it was necessary to bruit. Me pressricbutton 1" so long it was desired to have the switch g in the position R,aoco'i to Fig. ii short depression any one utton suillccs to achieve alast ing condition.

If, for example, q is dc ltn'essed, the armature rises, opens the lowercontact i and closes the upper contact 0'. The coil a now remainsexcitedv through this contact even if pressure button I; is released.The same applies to the pressure button r, in regard to the uppercontact 0 of the switching magnet e.

According to the arrangement shown in Fig. 2, the supply conductor 2| isconnected with one end of each coil a and (1 while the opposite end ofthe coil a is connected over a conductor 25 with the other supplyconductor 2|]. The circuit closing button q is interposed in theconductor 25 between the coil a and the supply conductor 20. The holdingcontact 0 of the coil a is connected with the stationary contact 1 ofthe coil 11, the last mentioned contact I being connected by a conductor26 with the supply conductor 20. Thus after the button q has beenactuated to energize the-coil a, the armature b is attracted and closesthe holding contact 0 and maintains the coil a in energized condition,the current flowing from the conductor 2i through the coil a, holdingcontact c, stationary contact I of the coil (1 and the conductor 26 tothe other supply conductor 20. Incident to the actuation of the armatureb, the switch lever g is actuated and the parts are maintained in thisposition until the flow of cur-- rent to the coil a is interrupted byactuation of the circuit opening button 3 or the button r is actuated.Upon actuation of the circuit closing button r, on the other hand, thecircuit of the coil (1 between the conductors 20 and 2| is closed over aconductor 21 and the armature e being raised closes the contact crelating to the coil (1 and thereby establishes a holding circuit forthe coil d from the supply conductor '2! through said coil. the relatedholding contact 0, the closed stationary contact I of the coil a and theconductor 20 connected with the conductor 25 between the button q andthe conductor 20.

In Fig. 1 further a rotatable lever p is illustrated which is pivotallyconnected at o with the armature e. :2 permits the system to be broughtdirect- 1y by hand into any desired position. It will be recognized fromthe constructional examples that each impulse current circuit has anumber of locking contacts 1 of which one is opened on selecting anotherimpulse giver. It will be rccognized further that to each impulse giverholding contacts of the magnet switch controlling the switch are relatedas for example the pressure button q to the holding contact 0.

The locking contacts 1 are controlled according to the constructionalexample shown by a lost mo tion of the magnet switch engaging on thecontact lever g. The locking contacts J can also,

however, be controlled from the pressure but tons, for example in thewaythat on switching in a pressure button the relevant locking contact 1is mechanically opened.

Further, nothing prevents arranging the look ing contact 1 on the switchlever g. Likewise the armature of each magnet switch can carry. inaddition to the holding contact for the other magnet. the main contactsof the switching position related to it, so that lever o serves merelyfor the mechanical locking of both switch magnets. The operation of thissystem differs in no way from that above mentioned.

Figs. 3 and ishow by way oi example two further practical embodiments ofthe invention.

According to lF'ig. 3 a single magnet armature i is alternatelyinfluenced by the magnet coils 2 and 3. The armature l is at d and 5pivotally connected with the levers B and i respectively, the fixediulcrums of which are indicated at B and 9. The upper ends of the leversS and l carry a contact bridge ill on which contact groups V, R and'Oare located. 1' denotes the complementary contacts, which in accordancewith the position of the levers 6 and 7 will abut against one of thesecontact groups.

The impulse givers consist of push buttons ll and I2. In the shownposition the push button l2 rests against its upper contacts. If thiscontact is depressed its lower contacts are connected. Springs 5, i6 arealso provided, which tend to hold the lever system in the position 0.

The supply conductor 20 is connected in common to one lower contact ofeach push button ii and [2, the other lower contact of the push but: tonll being connected by a conductor 30 with one terminal of the coil 3 theopposite terminal of which is connected with a conductor 3| con-, nectcdwith one of the upper contacts of the push button i2. The other uppercontact of the button I2 is connected with the other supply conductor2|. Thus upon depression of the button li a circuit is closed from theconductor 20 across the lower contacts of the button i i, the conductor30, coil 3, conductor 3| and upper contacts of the push button i2 to thesupply conductor 21 whereby the coil 3 is energized. The other lowercontact of the button I2 is connected by a conductor 32 with oneterminal of the coil 2 the opposite terminal of which is connected by aconductor 33 with one of the upper contacts of the button II, the othercontact of which is connected with the supply conductor 2|. Thus upondepression of the push button l2 a circuit is closed from the conductor20, lower contacts of the button I2, conductor 32', coil 2, conductor 33and the upper contacts of the button II to the supply conductor 2|whereby the coil 2 is energized. The alternate energization of the coils2 and 3 causes the lever system to move from left to right out of theintermediate position.

If, when the coil 3 is energized the button I2 is depressed, at firstthe coil 3 is switched off and immediately thereupon the coil 2 isswitched in over the lower contacts of the button 12. whereby the leversystem 6, l is forced into the position R. The lever system will howeveronly remain in this position as long as the push button l2 remainsdepressed. As soon as the button I2 is released the exciting circuit ofthe coil 2 is again interrupted, and the lever system is returned to pnormally closed control button is is interposed.

The conductor Iii is connected with one upper contact of each or thepush buttons ii and l2,.

the other upper contact of the button it being connected at 33 with oneterminal of the coil 2 and the other uppercontactof the button it beingconnected with one terminal of the coil t by the conductor 3i. 'Thesupply conductor 2% is connected with one lower contact of each of thepush buttons l l and ii, the other lower contact of the button ii beingconnected by a conductor 39 with the opposite terminal of the coil 3 andthe other lower contact of the button i2 being con nected with theopposite end of the coil 2 by a conductor 32. A branch conductor 35 isconnected with the supply conductor 2c and a holding contact id issecured to the right hand side of the lever system 5, i, When the leversystem is moved to the right, the holding contact M bridges theconductors 3B and to thereby establishing a holding circuit for the coil3 after the depression and release of the button ll. At the left side ofthe lever system c, l a second holding contact ii is arranged which isadapted to establish an electrical connection between the conductor 32and a conductor 3% connected with the supply conductor 28 whereby aholding circult for the coil 2 is established which is operative afterdepression and release of the push button 32.

If the button I2 is depressed while the coil 3 is energized, theexciting circuit of the coil 3 is first interrupted between the uppercontacts of the button l2 and immediately thereupon the coil 2 isexcited over the lower contacts of the button l2, whereby the contactgroup R is switched in by the armature i being attracted and theleversystem 6, i being forced to the left.

When the button i3 is depressed the one coil (2 or 3) which at thatmoment is excited, will be cut out and the lever system S, I will againreturn to the position 0.

.I claim: l

1. In combination a main unitary switching element movable to at leastthree positions of adjustment, control circuits, switch operatingelectro-magnets each including a winding and an armature, a mechanicalconnection between each armatureand said switching element, the windingsof said electro-magnets being interposed in said circuits, a pluralityof independently selectable control devices in said circuitscorresponding to the number of positions of said switching element forcontrolling the energization of said windings, a locking circuit for thewinding of at least one of said electro-magnets, and means infiuencedincident to the 'encrgizatlon of the coil oi the other electro-magnetforopening said locking circuit.

2. In combination, a main unitary switching element movable to at leastthree positions of adiustment, control circuits, switch operatingelectro-magnets each including a winding and an armature, a mechanicalconnection between each, armature and said switching element, thewindings of said electro-magnets being interposed in said circuits, aplurality of independently selectable control devices in said circuitscorresponda ing to the number of-positions of said switching element forcontrolling the energlzation of said windings, a locking circuit for thewinding of each oi said electro-magnetshand means influenced incident tothe energization of the coil of one of said electro-magnets for openingthe locking circuit of the other electro-magnet-.

3. An arrangement as claimed in claim 1 characterized in that saidconnection between the armatures and the main switch is a lost motionconnectlon whereby the opening oi said locking circuit is effected priorto actuation of the main switch in response to energization of thesecond mentioned electro-magnet.

4. In combination, a main unitary switching element movable to at leastthree positions of adjustment, control circuits, switch operatingelectro-magnets each including a winding and an armature, a mechanicalconnection between each armature and said switching element, thewindings of said electro-magnets being interposed in said circuits, aplurality of independently selectable control devices in said circuitscorresponding to the number of positions of said switching element forcontrolling the encrgization of said windings, a locking circuit for thewinding of at least one of said electro-magnets, said locking circuitbeing constituted in part by the control device for the winding of theother electro-magnet whereby upon energization of the last men- 'tionedelectro-magnet said locking circuit is opened. I

5. An arrangement as claimed in claim 1 characterized by the provisionof manually operable means for actuating said main switching element.

WILHELM LOHSSE.

